• Singly sealed to ensure long-term stability and protection against many external influences
• Have to be placed in the plastic reel with color scale to be used
• Gradation (pH): less than 6.4 - 6.4 - 6.6 - 6.8 - 7.0 - 7.2 - 7.4 - 7.6 - 7.8 - 8.0 - greater than 8.0
